Open AccessLiquid crystal terahertz modulator with plasmon-induced transparency metamaterial
Author(s) -
Jing Wang,
Hao Tian,
Yu Wang,
Xueyan Li,
Yujie Cao,
Li Li,
Jianlong Liu,
Zhongxiang Zhou
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.005769
Subject(s) - terahertz radiation , insertion loss , materials science , optics , metamaterial , modulation (music) , optoelectronics , surface plasmon , plasmon , liquid crystal , electromagnetically induced transparency , physics , acoustics
An electrically tunable terahertz (THz) modulator with large modulation depth and low insertion loss is performed with liquid crystal (LC) metamaterial. The modulation depth beyond 90% and insertion loss below 0.5 dB are achievable at normal incidence by exploiting plasmon-induced transparency (PIT) effect. The PIT spectra can be manipulated by actively controlling the interference between dipole mode and nonlocal surface-Bloch mode with LC. The incident angle tuning effect on PIT spectra shows that the large modulation depth and low insertion loss can remain over a wide range of working angles. The superior property and simplicity of design make this modulator promising in advanced terahertz communication.